Dantherm HCH 5 Installation And Service Manual page 16

How to balance the unit,
Procedure, continued
Step
14
continued
5 Connect the pressure manometer to pres-
sure adapter P1 and P2 and measure the
pressure difference on the supply air side
over the heat exchanger.
6 Balance the nominal air flow rate on the
supply air side by adjusting the potenti-
ometer for the supply fan until the pres-
sure difference determined on the graph
is achieved. The potentiometers are
placed on the back of the control panel.
Wait approximately two minutes before
the next adjustment of potentiometers, in
order to let the unit stabilise the air flows.
Strong wind against the building
might affect balancing the unit.
7 Connect the pressure manometer to pres-
sure adapter P3 and P4 and measure the
pressure loss on the exhaust air side over
the heat exchanger.
Action
P2
P1
P3
P4
Continued overleaf